Airtightness testing in Scotland low cost no VAT

As a joiner to trade, I have been working as a Joiner- contractor in the Northeast of Scotland for the last 25 years. Most of that time time was spent building ecohouses, learning the way things are done now years ago. I have built many houses and have seen things progressing towards higher and higher levels of energy efficiency in housing over that time. A few years ago I started air-tightness testing and have added MVHR commissioning to what I do. I know all about making a house air-tight when MVHR is intalled. I have loads of experience which I offer as free advice to any one who asks. A friendly customer service with clear communication is what I aim for in business.